either way you go lst or topping you can achieve about the same thats debatable though depends on your skill level and the genetics of you plants some strains respond better to on than the other try both only way to know for sure.
use both, you can get an incredible amount of top colas, use blazes fim and then lst the new shoots that pop out and fim them when they are ready and then lst those new shoots and fim them......you get the picture. each time you fim a shoot you should get between 4-8 new shoots from it.
So i just put an extra CFL in my grow box , and it grew 2-3 times the size in 2 days , i also made a new door for my grow box , it still needs a little light proofing , but for now it will do heres a couple pics of the plant now and my grow box